Has anyone hacked an Injen intake and hooked it up to this TB yet? If so, just curious how you did it since I've had my TB sitting in the garage for a few months now and haven't tried rigging something up yet.

 

dur dur, I feel dumb now. Someone go measure the inside of their ls4 throttle body. I'm curious as to what it is now.

 

lolz would u like me to try? i'm waiting for my R.A.W. 3" Intake to put my ls4 on. but once i get it i will hack some **** up 4 testing reasons

i work till 3 and am huntint after that till 8 but u shall have a PM around 830 my time and i'll let ya know

 

i want a 3.5 intake.... got the tb and harrop and ordered a ported mani...

ralli, if you make one let me know

 

all you need is a 3" to 3.5" coupler nothing crazy

 

True.



ETC Scaler Setting



Stock TB


LS4 TB

 

i need the inner diameter measurement first to properly size an intake.

btw, i can't read those cad drawings ebristol. my brain doesn't comprehend. lol

77 +/- .5 mm right?

 

Correct.
LS4 TB = ~77mm +/- .5mm

... that's why everyone just runs a 3" intake...
We call it a "3.5" TB"... but that's the average outside diameter. The ID is 3.03"

 

ahhhhhhh, I see says the blind man. LOL. Great learning experience.

 

You know...for someone with almost 5K posts you should already know this stuff! lol jk

 

ehh, it hasn't been talked about a whole lot. And I was really researching cooling mods hard core for the first 4K posts. lol.

I didn't even realize that I have that many posts. LOL.

 

subscribed

 

click and learn for me.

 

I thought this was determined to be a worthless mod? guess ill have to revisit this idea

 

I was under the impression that almost every TVS guy was running an LS4 TB, as the throat is big enough to accept it without modification.

 

maybe thats my problem lol

 

lol...if it is...then that must be a problem for me as well.

 

i'm going to avoid reading all this and just chime in.

the only time this larger TB would make any effect is if your maxing out the stock 6X mm tb

i HIGHLY doubt any of the blower cars are doing this.

theres a substantial vacuum being pulled on the incoming air.

the reason people report AFR changes is due to maf cal's being off now that you've changed a piece of your intake.

also, if your intake is ANY bit smaller then the tb, you loose that effective area. fluid flow, simple.

the power jumps are often caused by the uneducated simply not knowing that your approaching and passing 100%VE quicker, with less TPS due to the larger butterfly plate.

the add'ed harshness down low is associated with that same function^^^^^


now, granted this isnt apples to apples, as i'm pushing pressurized air, and you guys pull atmospheric pressure....but none the less, i'm using an OE tb on my intake manifold...she makes pretty good power i'd say.

 

That's what I have been waiting on myself! I guess they ran out of MAF bungs and just got them in as I was told literally a few minutes ago. I was thinking of hacking mine up somehow as well since my original Injen has seen better days!

 

OK, soo it this being deemed a useless mod again..? I was under the impression that my tune did not use VE but only used the MAF...

Also if the cold air intake is now the "restriction" then the RAW is still a 3" intake..? Soo your telling me that there is no power to be made with the LS4 TB and a CAI, when a CAI makes power on it's own..?

 

if the motor adn blower were perfect, that is, if they used all the air we bring in, then what ever the smaller piece is (cai or tb) wold be your restriction.

most of the time its the CAI, however the blower inlet, and the blower its self, along with the cylinder head, cam design, and intake manifold all pose significant restrictions.

 

First... your ECU uses both the MAF and VE tables to calculate air flow, unless your tuner changed the dynamic airflow settings.

Second... if your intake is smaller than 2.75"... it's the smaller diameter than the TB... thus more restrictive than the TB.
However... it's not THE restriction in the system.

If you are making enough power to cause a vacuum in the intake strong enough to cause power loss than the bigger TB and a 3" intake would benefit... hence why I suggest it only to people making big power.

 

Well I'm pretty certain my tuner said that the VE is disabled as the MAF is more accurate or something. It was tuned by Dan djt81185 soo whatever he does...

I understand that there are many other restrictions in the engine...

The intake is a RAW, which is supposed to be 3" ID I believe.

And once again, I would like to ask if my present mods justify this TB and CAI combo...? I was assuming I got some gain, as it "feels" like it...

 

Dan's a good tuner... if he disabled it.. it's gone.

As far as the TB & CAI... the only way to tell is to try it. Every car is different.

 

Thanks for the info. It seems to be doing "something" for the car. It feels a bit faster and the response is nicer.